Question

if a=5,d=3 and abasen=50 in AP, then n=

Answer 1

Given
_____
a=5
d=3
an=50
n=?
an=a+(n-1)d
=>50=5+(n-1)3
=>50-5=3n-3
=>45=3n-3
=>45-3=3n
=>42=3n
=>n=42/3
=>n=14(ans.)